package com.atguigu.gulimall.product.service.impl;

import org.springframework.stereotype.Service;

import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.atguigu.common.utils.PageUtils;
import com.atguigu.common.utils.Query;

import com.atguigu.gulimall.product.dao.CategoryDao;
import com.atguigu.gulimall.product.entity.CategoryEntity;
import com.atguigu.gulimall.product.service.CategoryService;


@Service("categoryService")
public class CategoryServiceImpl extends ServiceImpl<CategoryDao, CategoryEntity> implements CategoryService {

    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<CategoryEntity> page = this.page(
                new Query<CategoryEntity>().getPage(params),
                new QueryWrapper<CategoryEntity>()
        );

        return new PageUtils(page);
    }

    @Override
    public List<CategoryEntity> listWithTree() {
        List<CategoryEntity> categoryEntityList = baseMapper.selectList(null);

        //categoryEntityList.stream().filter(categoryEntity -> categoryEntity.getParentCid() == 0)
        //        .map((menu) -> {
        //            menu.setChildren();
        //        })

        return categoryEntityList;
    }

    ////递归查找所有菜单的子菜单
    //private List<CategoryEntity> getChildrens(CategoryEntity root,List<CategoryEntity> all){
    //
    //    List<CategoryEntity> children = all.stream().filter(categoryEntity -> {
    //        return categoryEntity.getParentCid() == root.getCatId();
    //    }).map(categoryEntity -> {
    //        //1、找到子菜单
    //        categoryEntity.setChildren(getChildrens(categoryEntity,all));
    //        return categoryEntity;
    //    }).sorted((menu1,menu2)->{
    //        //2、菜单的排序
    //        return (menu1.getSort()==null?0:menu1.getSort()) - (menu2.getSort()==null?0:menu2.getSort());
    //    }).collect(Collectors.toList());
    //
    //    return children;
    //}

}